Dietary supplements
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Dietary Supplement Use: Prevalence and Demographics
Dietary supplements are widely used around the world, with up to 50% of adults and about one-third of children in developed countries taking them regularly Binns2018Bailey2011Mishra2021. In the United States, about half of the population uses dietary supplements, and usage is especially high among older adults, non-Hispanic whites, and those with higher education levels Bailey2011Mishra2021. Multivitamin-multimineral supplements are the most commonly used, followed by vitamins, minerals, botanicals, and specialty supplements Bailey2011Brown2017. Among athletes, supplement use is even more prevalent, with about 85% of elite track and field athletes reporting regular use .
Health Benefits and Risks of Dietary Supplements
Dietary supplements can help address specific nutrient deficiencies, such as vitamin A and iron in developing countries, folic acid during pregnancy, and vitamin D and calcium for bone health in older adults . In cases of established deficiencies, supplements are beneficial and sometimes necessary Binns2018Rautiainen2016Maughan2004. However, for well-nourished individuals, the benefits of high-dose supplementation for chronic disease prevention are not consistently supported by scientific evidence Rautiainen2016Coates2024. Some studies suggest that daily low-dose multivitamin supplementation may reduce the risk of cancer and cataracts, especially in men .
On the other hand, excessive intake of certain nutrients through supplements can increase health risks, such as higher cancer rates, and may cause toxic reactions or interact negatively with medications Binns2018Rautiainen2016Bloomgarden2018. Adverse events related to supplements are rare and mostly minor, but serious issues can occur, particularly with products marketed for sexual enhancement, weight loss, and sports performance .
Regulation, Quality, and Safety Concerns
Regulation of dietary supplements varies by country and is generally less strict than for pharmaceuticals Binns2018Coates2024Brown2017. In the United States, supplements are regulated by the FDA and FTC, but they do not require the same level of testing as conventional drugs Bloomgarden2018Brown2017. This can lead to problems such as contamination with heavy metals, inaccurate labeling, and the presence of undeclared or illegal substances Binns2018Brown2017. Adulteration is most common in supplements for sexual enhancement, weight loss, and bodybuilding . The risk of unintentional doping is a concern for athletes, as some supplements may contain prohibited substances not listed on the label Maughan2004Maughan2007Mallick2023.
Evolving Science and Personalized Nutrition
Research on dietary supplements is ongoing, but many studies lack the rigor needed for definitive conclusions about their health effects . New scientific approaches, such as nutrigenomics and microbiome analysis, are being used to better understand how supplements work and to develop personalized nutrition strategies . The science behind dietary supplements is becoming more sophisticated, especially as they are increasingly incorporated into clinical practice and self-care .
Public Health and Consumer Guidance
While supplements can play an important role in addressing nutrient deficiencies and supporting specific health needs, most people do not require them if they have a balanced diet Binns2018Rautiainen2016Maughan2004. It is important for consumers to be cautious, avoid unnecessary high doses, and consult healthcare professionals before starting supplements, especially if they have underlying health conditions or are taking other medications Binns2018Rautiainen2016Maughan2007. Improved regulation, better quality control, and more consumer education are needed to ensure the safe and effective use of dietary supplements Binns2018Brown2017.
Conclusion
Dietary supplements are widely used and can be beneficial for certain populations and specific deficiencies. However, their use should be targeted and based on individual needs, as unnecessary supplementation can pose health risks. Stronger regulation, better scientific evidence, and increased consumer awareness are essential to maximize benefits and minimize harms associated with dietary supplements Binns2018Coates2024Rautiainen2016+1 MORE.
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Most relevant research papers on this topic
Problems and Prospects: Public Health Regulation of Dietary Supplements.
Dietary supplements pose public health concerns, including potential toxic reactions, heavy metal contamination, and potential interactions with pharmaceuticals, and require further regulation to protect public health.
The Evolution of Science and Regulation of Dietary Supplements: Past, Present, and Future
Dietary supplements have evolved since 1994, but their health effects and efficacy are still inconclusive, with new technologies and approaches advancing their science and clinical applications.
The use of dietary supplements by athletes
Dietary supplements may be useful for athletes in specific circumstances, but their use should be based on a full understanding of potential benefits and risks, and consulted with a sports nutrition professional.
An overview of herb and dietary supplement efficacy, safety and government regulations in the United States with suggested improvements. Part 1 of 5 series.
Dietary supplements are popular in the US, but their safety and efficacy are often questionable, with potential risks from drugs and unsubmitted new ingredients.
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